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WIREl ARMORED CABLE SPLICE Filed Oct. 21, 1944 2 Sheets-Sheet 2 INI/ENTUR .qMEs J Momzlsoy /ITTORNEY Patented Oct. 28, 1947 WIRE-ARMORED CABLE SPLICE James J. Morrison, Worcester, Mass., assignor to The American Steel and Wire Company of New Jersey, a corporation of New Jersey Application October 21, 1944, Serial No. 559,754

2 Claims.

This invention relates to wire-armored cable splices, the object being to provide a splice that is almost as light in weight as can be obtained when the cable armoring wires are directly interlocked with seizings without the use of a joint box, while at the same time providing a splice having a tensile strength approaching or equaling that of the cable and which frees the cable conductors from compression when the cable is tensioned. The invention has other advantages which will become apparent from the following disclosure.

The accompanying drawings illustrate specic examples of the invention, the various figures being as follows:

Figure l, a perspective of a finished splice;

Figure 2, a longitudinal section of Figure 1; and

Figure 3, a perspective of a detail representing a modification.

More specifically, these drawings show a wirearmored cable splicing device comprising a tubular part I tting over the spliced cable conductors 2 and having an exterior over which the oppositely extending armoring wires 3, at the splice, may be interlaid and clamped, as by means of seizings 4, the oppositely extending wires being cut off beyond the ends of the seizings and bent over, as at 5. v

The exterior of the tubular part I has projections 5, which may be in the form of short longitudinal ns that are circumferentially spaced around this exterior to separate the interlaid armoring wires into circumferentially spaced groups. The tubular part I is radially rigid so it radially supports the interlaid armoring wires from compressing the spliced conductors 2 when the spliced cable is tensioned. Thel various armoring wires are easily interlaid in appropriately spaced groups through the convenience of the projections 6.

The opposite ends of the part I have axially aligned externally outwardly tapering sleeve parts 'I iitting over the conductors 2 adjacent their splicings, these sleeve parts rigidly extending from the tubular part I and externally having longitudinal fins 8 aligning with the projections, or iins, 6 for leading the armoring wires therebetween in similarly circumferentially separated groups. These sleeve parts provide for more conveniently arranging the armoring wires for interlaying on the part I and provide the device with the length required for structural stability. Preferably the inner ends of the outwardly tapering sleeve parts I have slightly greater diameters vthan the tubular part I sothat the seizings 4, or

other clamping means, deiiect the armoring wires radially inwardly and further secure them against pulling apart due to tension. Preferably, the outermost ends of the sleeve parts 1 have necks El provided with projections, or short fins, I0 aligning with the fins 8 and the projections, or ns, E, these necks being adapted to accommodate seizings I I for effecting still further security. The openings I2 in the outer ends of the necks of the sleeve parts 'I are of smalle;` diameters than the passage through the device therebetween registering with the conductor splicings, whereby to provide greater freedom for these splicings while the ends more securely embrace the conductors. It is possible to pull the splicings through the end opening since the splicings can compress, but it is undesirable t0 maintain compression on the splicings continuously.

The device may be made as an integral casting which may be slid along the conductors when the armoring wires are laid back to bear the conducters, the device being slid over the conductor splicings, after they are made, and the armoring wires arranged as described. In the case of the modification, the device is made in the form of two castings as shown in Figure 3, thus separating the device centrally of its tubular part I, and the projections B are in the form of apertured lugs for receiving fastenings joining the two castings into a rigid unit.

This invention provides for the combination of the oppositely extending electrical conductors 2, having their ends spliced together, with the radially rigid tubular part I fitted over the spliced conductor ends and the wire armoring 3, which is helically laid over the conductors, oppositely extending over the outside of the part I and interlaid on this outside, in conjunction with means for clamping the interlaid portions of the wires on this outside, as represented by the wire seizings 4. The tubular part I has the projections 6 spaced circumferentially therearound and separating the armoring wires into circumferentially spaced groups and the opposite ends of the part I have the axially aligned externally outwardly tapering sleeve partsv 'I tted over the conductors adjacent their spliced ends. These sleeve parts rigidly extend from the tubular part and externally have longitudinal ns 8 aligned with the projections 5, the armoring wires 3 extending to the tubular part over the cutsides of these sleeve parts in the same groupings as between the projections 6. As described, the openings I2 in the outer ends of the sleeve parts, this being in the necks 9 that are parts of the sleeve parts, are of smaller diameters than the passage through the tubular part registering with the spliced ends of the conductors.

When the described splice is tensioned, by tensioning of the cable, the interlaid armoring wire portions are firmly locked .together against the rigid support -of the radially rigid part l, this giving the splice great tensile strength and also relieving the conductors from any compression. The splice may be very easily assembled clue to the convenience of the outwardly tapering sleeve parts l and the various projections and ris, all of which cooperate to permit a cable workman to make the splice conveniently, quickly and surely.

A further modification may comprise making the unit shown by Figure 1 in a longitudinally split form so there are two halves that are completely laterally separable. This has various advantages, such as permitting a repair in the armor where the cable core is undamaged or uncut and the armor wires only are damaged, since the two halves may be placed about the uncut core to provide for the repair of the armor. This modification is not illustrated since it would appear the same as Figure l excepting for the longitudinal split.

I claim:

1. A protector for splices in wire armored ca- -ble comprising a substantially rigid tube adapted 'to-receive within its bore the inner plies of a cable, including the insulation at the region of a splice, the exterior of the tube having sets of radial ns adjacent the ends, sets of radial nns spaced inwardfrorn said rst named hns and aligned therewith, and a set of radial ns centrally or" the Ylength ofthe tube spaced inward from said second named ins and aligned therewith, the fins lthus providing longitudinal channels extending the length of the tube, the exterior surface of the tube being adapted to carry cable armor wires with wires from opposite cable sections overlapping and the nns retaining the wires in parallel-- ism, the `spaces between sets oi ins being adapted to receive servings for securing the wires to the tube.

2. A protector for splices in Wire armored cables comprising a substantially rigid tube adapted to receive within its bore the inner plies of a cable including the insulation, the tube bore being of enlarged diameter at the mid-portion to accommodate a cable splice and tapering toward the ends to provide a snug iit with cable insulation, the exterior of the tube having sets of radial fins adjacent the ends, sets of radial iins spaced inward from said rst named ns and aligned therewith, and a set of radial iins centrally of the length of the tube spaced inward from said second named ns and aligned therewith, the ns thus providing longitudinal channels extending the length of the tube, the exterior surface of the tube being adapted to carry cable armor wires with wires from opposite cable sections overlapping and the iins retaining the wires in parallelism, the spaces between sets of fins being adapted to receive servings for securing the Wires to the tube, the exterior diameter of the tube being less in the space between said first and second named ns than in the region of said first named fins, whereby tension may be applied to the wires by serving wrapped therearound in said space.

JAMES J. MORRISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS l Number Name Date 1,866,235 Thiel July 5, 1932 1,647,699 Hoeftmann Nov. 1, 1927 1,103,079 Rhodes July 14, 1914 472,933 OConnor Apr. 12, 1892 1,073,596 Egerton Sept. 23, 1913 FOREIGN PATENTS Number Country Date 391,826 Germany Mar. 19, 1924 229,506 Great Britain Feb. 26, 1925 

